– piwik.js has been YUI-compressed since Piwik 0.4; with 0.5.5, you can now use js/index.php to serve up a deflate/gzip compressed piwik.js if your web server doesn’t have mod_deflate or mod_gzip (8.3K vs 3.5K)

Anthon and Matt contributed the bulk of changes for this release. Thanks also go out to Andrew Sohn, feyp, halfdan, jr-ewing, masterkeedu, pebosi, and yareckon for patches.